Following the massive earthquake and tsunami of 11 March 2011, a number of explosions and fires took place at the reactor buildings of Japan's Fukushima Daiichi nuclear plant. Japan declared a state of alert and reported leaks of radioactive material. Given the magnitude and the global dimension of the disaster, Japanese authorities and the international community are following the situation very closely. A series of sources provide the public with up-to-date information on the accident's possible impacts on Europe's environment as well as radiation measurements across Europe.